Assinale a alternativa que mostra onde uma onda mecânica não consegue se propagar; a) Água
b) Solo
c) Vácuo
d) Ar
e) Metal

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

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Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)